275% is the change from 4 to 15
Calculation steps:
[( 15 - 4 ) ÷ 4] x 100 = 275%
Formula
Percentage change = [(15 - 4) / 4] x 100
Subtract the new number by the original number
15 - 4 = 11
11 ÷ 4 = 2.75
2.75 x 100 = 275%
Example